Headphone



FIG. 1 is a front, top, right perspective view of a headphone showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view there of;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right elevation view thereof; and,

FIG. 7 is a left elevation view thereof.

The broken lines showing portions of the design in all figures are included for the purpose of illustrating environment and unclaimed features and form no part of the claimed design. 

CLAIM The ornamental design for a headphone, as shown and described. 